The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 2006
Filed:
Nov. 03, 2003
Applicant:
David Charles Mcdonald, Longmont, CO (US);
Inventor:
David Charles McDonald, Longmont, CO (US);
Assignee:
eLCOS Microdisplay Technology, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01); G03B 21/00 (2006.01); G02B 5/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
Optical engines using a reduced number of components offer advantages over more complex optical systems. Three panel optical engines have offered the advantage of relatively high throughput but at the cost of complexity and increased components on the bill of materials. Conventional two-panel engines have required the use of complex retarder structures to achieve the dual polarizations state for the three primary colors. The present invention achieves this goal while using simpler optical retarders.